Electric switch



Jan. 24, 1928.

C. E. ANDERSON ELECTRIC SWITCH 192s '2 sheets-sheet 1 Filed Aug. 15

7 INVENTOR CHEM 5R/c /VDERSOP/ BY l/M ATTORNEYS Jan.24,192s. 1,657,336

C. E. ANDERSON ELECTRIC swITc'a Filed Aug. 15. 19H 2 Sheets-Sheet 2 Y n INVENTOR 416 fr CAI/ef. .ER/c lfvoeR'so/v ATTORNEYS` 1, i. tnt

FEEQ

ERIC ANDERSON, QF STRATFORD, CQNNECTICUT, ASSXGNUR T l IBBYm @LEUTE COMPANY, 0F BRIDGEPOET, CNNECTICUT, A GRPTIN 0F GON- METIG.

MEMRI@ SWITCH.

Application Meal Luguf 1li, 1933. Serial No. 657,535.

My invention relates to electric switches, and particularly to iush switches. flhe object ot my invention is to provide a swltch ot shallow construction having among other. t tentures Yrit-'noveltyan improved arrangement ot the shunt straps by which theswitch is adapted Yfor tour-point or pole-changing use.

ln the accompanying drawingsc Fig. i is a broken lan view of a switch embodying my invention. in one form; n

Fig. 2 is a section on the line 2-2,Fig. l, certain ot the parts being broken away beyond the .section e; f

ligs. 3 and d are sections on the lines 3-3, tlm-Al, respectively, Fig. i g u Fig. 5 is an inved pian view ot a switch body; and n Figs. t and are perspective views ot detaiis. y

Thepresent switch has been designed particnlarly ttor installation in a shallow ontlet hon l5, such as is coonly used ion walls, roorn partitions ond the lilre, in which coinpact structure and slight depth are desirable.

lln outlet bones ot this type, space tor the wiring connections to the switch is etten not i available by reason ot the depth ot the usual switch body. l have niet this diculty by so designing the insulating switch body lo as to provide enterior longitudinal side channels l? and transverse ena channels i3 in the lower sorteos ot the switch body, while the intermediate central boss-iilre portion it on the lower tace ot the body is ot sut'tcient size to permit an interior chamber ot entficient eine to accommodate the inechaniam which ll employ. llt will be noted that the channels l? and i3 are ci ample depth and eine to accoodate within the area ot the titting the wires 2l which lead to the several wire terminals. .linple clearance room 22 beneath the switch body is thus adorded tor other wires should there be any necessity theretor.

The switch illustrated is ot the tour-point or pote changing type. 1Upon the depressed ledges 23 at the several corners ot the upper 'lace ot the switch body, are mounted corn-` bined wire terminal and switch contact plates 2t, 25, 2d, and 27'. Underlying the terminal plates 2t and 25 are associate contact .2d and 29, both plates being held sie in position by the securing screws .30 which pierce the end ot the body and talie'into tappod holes in the plates 24 and 25. Switch contacts 31 and 32 of the plates 24 and 25 are odset therefrom and lie in the same vertical planes as the contacts 33 and 34: which are odset downward from the plates 28 and 29. It will be noted that the ledges upon which these terminal plates rest are depressed to a lower level than the ledges at the op osite end of the switch body-this extra depth being substantially the thickness ot the plates 28 and 29 so that the plates y 2d and 25 lie in the plane of the plates 26 and 27 at theopposite end ot the switch body. rlhe upper contacts at each end ot the switch may thus be made ot uniform construction.

At the opposite end ot the switch chamber the plates 26 and 27 have upwardl odset contacts 35 and 36, counterpart to t e contacts 31 and 32. lhe lower contacts 37 and 38, counterpart to the contacts 33 andtt, are integral with the shunt plates 39 and t@ extending transversely oi the switch chamber. These plates are accommodated in a channel el let into the lower tace oit the base adjacent the boss 19 and communicatin through apertures 4t2 and d3 with the switc chamber 20. 'lhe Contact wings 3'( and 38 are oitset inward from and at right an "les to the shunt straps 39 ande() and pjeet through these apertures t2 and v423 into proper position to engage the switch blades. 'llhe strap 39 has a foot piece ed which entends into a bay l5 communicating with the channel 4-1. The strap l0 has av similar toot piece t6 which extends into a similar hay` l. The screw bolts 4&3 and t9 connect the respective shunt lates 33 and 40 with the terminal plates 2% and 26 for the contacts 36 and 35. This cross or shunt connection t@ of the lower contacts at one end of the Switch adapts the switch for tour-point or polechanging use as well understood in the art.

'While the shunt straps 39 and 4&0 are received in the same channel 41, they are mit spaced apart by the odset in the strap 39, while the odset 51 in the opposite direction in the same strap serves to locate the contact3i transversely in register with the contact 38. ,'lhe spacing Abetween the straps adorded by the odset 5@ is sucient to Wit loV

tain the parts properly insulated from each other; but this separation is further assured by iiowing into the channel linsulatin ,matenal such Yas wax 52 (shown only in ig. 3.) The wax also covers the heads of the screw bolts 48 and 49 and the screw bolts 53 'which secure the terminal plates 26 and 27 in position.

The switch mechanism may be of any suitable t fon instance, of the general coristruction indicated in my coplendin application Ser. No. 509,242. I ave s own a pair of push buttons 54 engaging the opposite ends of a pivoted rocker 55 which o er ates a toggle mechanism to throw theswltch bar 56 to one or the other circuit closin pos1- tion. When the switch bar 56 (Fig. 2 is in en gement with the contact 34, it establis es connection with contact 36 of terminal plate 27 at the opposite end of the switch chamber, whereas, when the blade is swung to its other position, its engagement with contact 38 shunts the circuit through strap to terminal plate 26 at the opposite side of the cham'ber at this end of the switch. A like cross shunt at the same end of the chamber is effected by strap 39 when the switch blade 57 'is -swung from engagement with contact 35 to contact 37.

The switch mechanism is carried by a yoke 58 extending longitudinally of the switch chamber and having ring-like bays y de rings 59 and the win iii '59 :for the accommodation of the push but'- tons 54 and intermediate odset wings 60 constituting `.parallel frame plates on which the switch mechanism is mounted.' To prevent the entry of dust into the switch chamber', I provide a plate 61 of insulating ber, paper or the like, which rests upon led 62 at opposite sides of the switch cham r. Its central area is apertured to accommodate the 60 of the iyoke,

portions of the plate tween suc reforming tongues 63 which are sprun beneath 4the oke on opposite sides of th wings 60 an serve to maintain the cover plate -in position. It will be noted-that the portion of the yoke lying between the bays 59 and ipwarly oset ends of the tgoke, is slightly epressed to accommodate e plate 6l, the up r surface of which is thus sub'- antigly ush with the upper face of the e throw of the push buttons '54, and therefore of the rocker 55 is preferably lim ited by the shoulders 64 iormed at opposite ends of the insulating body. The frame is thus relieved from the shock of impact by the rocker. The impact of the switch bar carrier 65 against the legs of the frame'O is cushioned to a certain extent by the enent of the s ring wings of the switch gar with the fixed) contacts which they enarious structural modifications will readil occur to those dealing with the problem which do not depart from what I claim as my invention.

I claim- 1. In an electric switch, an insulating body of generally rectangular shape having .wire terminals on its upper surfaces at opposite sides of one end, switch contacts associated therewith, a transverse channel formed in the lower face of said base at said end, shunt straps overlying each other in said channel but insulated from each other, switch contacts associated @with said shunt straps and lying in the piancs of the switch contacts associated with the wire terminals on the upper face of the body, together with means for electrically connecting said shunt straps respectively with the said wire terminals, the contact of each strap lying in the plane of the contact of a wire terminal 0pposite that to which the strap is connected. 2. In an electric switch, a chambered insulatin Vbody transversely channelled on its lower ace at one end and ierced to afford passages between the cham r and channel switch contacts mounted on the upper face ci the body and projecting into the chamber, shunt straps located in the channel and insulated form each other, said straps havin contacts entering the chamber through sai passages and respectively aligned with said first mentioned contacts on the upper face of the body, and means connecting each strap respectively with the upper contact opposite that with which the shunt contact is in alignment.`

3. In an electric switch, a chambered insulating body channelled on its lower face and ierced to aord assa s between the c amber and channe switch contacts mounted on the upper face of the body and rejecting into t e chamber, shunt straps ocated in the channel and spaced apart to insulate the same from each other, said straps having contacts enterin the chamber through said assages an respectively `aligned with sai first mentioned contacts on the upper face of the body, and means connecting` each strap resplectivel with the upper contact opposite t a wit which the shunt contact is 1n alignment. 4

4. In an electric switch, a chambered insulating body channeled on its lower face and ierced to aiord assages between the c amber and channe, switch contacts -mounted on the u per face of the body and projecting into t e chamber, shunt straps ocated in the channel, one of said stra s being odset to space the same form t e other strap, said straps having contacts entering the chamber through said pes and respectively aligned with said first mentxoned contacts on the upper face of the body1 and means connecting each strap respectlvely with the upper contact opposite mamas that with which the shunt contact is in alignment.

5. In an electric switch, a chambered bod)T recessed in its lower face at one end of the chaniber to aord a transverse channel and an oifset bay at one end of the channel and pierced at the opposite end of the channel to afford a passsage between said channel and chamber, 'in combination with a shunt strap arranged in said channel and having a foot piece at one end to enter the bay and a switch contact at its other end entering the chamber through said passage.

In an electric switch, a chambered body recessed in its lower face to afford a channel and an offset bay and pierced to afford a passage betweeen said channel and chamber, 1n combination with a shunt strap arranged in said channel and having a foot piece atv one end to enter the bay and a switch contact at its other end entering the chamber through said passage, the switch contact 1ying in a plane at right angles to the plane of the strap.

7. In an electric switch, a chambered body recessed in its lower face to afford a channel and an offset bay and pierced to afford a passage between said channel and chamber in combination with a shunt strap arranged in said channel and having a oot piece at one end to enter the bay and a switch Contact at its other end enterin the chamber through said passage, the oot piece being offset from the strap and lying in another substantially parallel plane.

In testimony whereof I have signed my name to this s eciication.

ARL ERIC ANDERSON. 

